MIPS: Change {set,clear,change}_c0_<foo> to return old value.

This is more standard and useful and need for the following fix to work
correctly.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

diff --git a/arch/mips/include/asm/mipsregs.h b/arch/mips/include/asm/mipsregs.h
index 0417516..526f327 100644 (file)
--- a/arch/mips/include/asm/mipsregs.h
+++ b/arch/mips/include/asm/mipsregs.h
@@ -1391,11 +1391,11 @@ static inline void tlb_write_random(void)
 static inline unsigned int                                     \
 set_c0_##name(unsigned int set)                                        \
 {                                                              \
-       unsigned int res;                                       \
+       unsigned int res, new;                                  \
                                                                \
        res = read_c0_##name();                                 \
-       res |= set;                                             \
-       write_c0_##name(res);                                   \
+       new = res | set;                                        \
+       write_c0_##name(new);                                   \
                                                                \
        return res;                                             \
 }                                                              \
@@ -1403,24 +1403,24 @@ set_c0_##name(unsigned int set)                                 \
 static inline unsigned int                                     \
 clear_c0_##name(unsigned int clear)                            \
 {                                                              \
-       unsigned int res;                                       \
+       unsigned int res, new;                                  \
                                                                \
        res = read_c0_##name();                                 \
-       res &= ~clear;                                          \
-       write_c0_##name(res);                                   \
+       new = res & ~clear;                                     \
+       write_c0_##name(new);                                   \
                                                                \
        return res;                                             \
 }                                                              \
                                                                \
 static inline unsigned int                                     \
-change_c0_##name(unsigned int change, unsigned int new)                \
+change_c0_##name(unsigned int change, unsigned int val)                \
 {                                                              \
-       unsigned int res;                                       \
+       unsigned int res, new;                                  \
                                                                \
        res = read_c0_##name();                                 \
-       res &= ~change;                                         \
-       res |= (new & change);                                  \
-       write_c0_##name(res);                                   \
+       new = res & ~change;                                    \
+       new |= (val & change);                                  \
+       write_c0_##name(new);                                   \
                                                                \
        return res;                                             \
 }